Configuring Basic Storage Services; Creating A Disk Domain - Huawei OceanStor 2000 V3 Series Features Manual

OceanStor V3 Series
HyperMetro Feature Guide for File
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4.5 Configuring Basic Storage Services

This section describes how to configure basic storage services for the HyperMetro solution.

4.5.1 Creating a Disk Domain

The types of disks in a disk domain decide which storage tiers can be created. The first step
for creating a storage pool is to create a disk domain and specify the types and number of
member disks.
Context
When creating a disk domain, you can select self-encrypting disks to encrypt the disk domain.
Encrypted disks are not sold in mainland China.
You are advised to use different disk domains to create storage pools for the block storage
service and file storage service.
For 2000, 5000, 6000, 18000 series storage systems, a disk domain consists of the same
storage media or different storage media of disks. Disks of the same storage media form a
storage tier. The system supports the following storage tiers:
l
l
l
To prevent data loss or performance deterioration caused by a member disk failure, the
storage system employs hot spare space to take over data from the failed member disk. The
supported hot spare policies are as follows:
l
Issue 05 (2018-01-30)
admin:/>add white_list sn=XXXXXXXXXXXXXXXXXXXX
Command executed successfully.
(Optional) Run the change white_list enable_switch=no command to close the whitelist
if you do not need to configure it.
The high-performance tier consists of SSDs and provides the highest performance. As
the SSD storage media have a high cost and low capacity, this tier is suitable for storing
frequently accessed data.
The performance tier consists of SAS disks and provides modest performance. As SAS
storage media have a modest cost and large capacity, this tier is suitable for storing
infrequently accessed data.
The capacity tier consists of NL-SAS disks and provides the lowest performance. As
NL-SAS storage media have the lowest cost and largest capacity, the capacity tier is
suitable for storing a large amount of seldom accessed data.
– High
The capacity of one disk is used as hot spare space if the number of disks at a
storage tier equals to or fewer than 12. The hot spare space non-linearly increases as
the number of disks increases. When the number of disks at a storage tier reaches
175, the storage tier uses the capacity of one disk in every 100 disks as the hot spare
space.
– Low
The capacity of one disk is used as hot spare space if the number of disks at a
storage tier equals to or fewer than 25. The hot spare space non-linearly increases as
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